 Hello and welcome to the session. Let us understand the following problem today. Write minor and cofactors of the elements of the following determinant. We have determinant with elements 2, minus 4, 0 and 3. Now, before writing the solution, let us understand what are minor and what are cofactors. Minor. Minor of an element aij of a determinant is a determinant obtained by deleting its i-th rule and j-th column in which element aij lies. Minor of an element aij is denoted by m of ij. Now, let us understand what are the cofactor. Cofactor of an element is aij which is equal to minus 1 to the power i plus j mij. Now, where mij is the minor. Okay, now let us write the solution. Given to us the determinant as 2, minus 4, 0 and 3. Now, let us find the minus first. So, minor of the element a11 that is this element is equal to m11 which is equal to 3. Now, similarly, minor of the element a12 which is this is equal to m12 which is equal to 0. Now, minor of the element a21 which is equal to m21 which is a21 is 0. So, its minor will be minus 4. Now, minor of the element a22, a22 is 3. So, deleting all the rows in column so we are left with 2. So, m22 is equal to 2. Now, finding the cofactors. Cofactor of a11 which is equal to a11 is equal to minus 1 to the power 1 plus 1 m11 which is equal to minus 1 square into 3 which is equal to 3. Similarly, cofactor of a12 is equal to a12 which is equal to minus 1 to the power 1 plus 2 into m12 which is equal to minus 1 to the power 3 into 0 which is equal to 0. Now, cofactor of a21 is equal to a21 which is equal to minus 1 to the power 2 plus 1 into m21 which is equal to minus 1 to the power 3 into minus 4 which is equal to 4. Now, cofactor of a22 is equal to a22 which is equal to minus 1 to the power 2 plus 2 into 2 which is equal to minus 1 to the power 4 into 2 which is equal to 2. Now, the required answer is m11 is equal to 3, m12 is equal to 0, m21 is equal to minus 4, m22 is equal to 2. Similarly, c11 is equal to 3, a12 is equal to 0, a21 is equal to 4 and a22 is equal to 2. And this is the required answer. I hope you understood the problem. Bye and have a nice day.